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{No Model.)

J. P. LYON. JAR.

No. 603,911. Pdtented May 10,1898.

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[Starts JULIAN P. LYON, OF DETROIT, MICHIGAN.

JAR.

SPECIFICATION forming part of Letters Patent No. 603,911, dated May 10,1898.

Application filed September 20, 1897. Serial No. 652,308. (No model.)

To all whom it ntay concern.-

Be it known that I, JULIAN P. LYON, of Detroit, in the county of Wayneand State of Michigan, have invented a new and Improved Jar, of whichthe following is afull, clear, and

This invention is an improvement in that class of jars in which the capor closure is held securely by atmospheric pressure and without the useof a fastening device, the invention having such peculiar constructionthat the cap may be readily displaced without injuring the gasket andwithout the liability of chipping the material of which the jar iscomposed and the invention also having such peculiar construction thatthe gases may be automatically and more effectively exhausted during theprocess of preserving the contents of the jar.

This specification is the disclosure of several forms of my invention,while the claims define the actual scope of the invention.

Reference is to be had to the accompanying drawings, forminga part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional view of my invention, showing the cap raisedabove the jar. Fig. 2 is a sectional view showing the cap in place. Fig.3 is a sectional view with the cap in place and illustrating aslightly-different construction. Fig.4 is a plan view of the invention,and Fig. 5 is a detail section of a second variation of the invention.

The form of the invention shown in Figs. 1 and 2 has a jar the body a ofwhich may have any desired form and the upper portion or mouth of whichhas an annular groove 6 extending around it. Above the groove 1) is anannular rib o, forming an upper horizontal shoulder 61 and having arecess e therein, which leads from the groove 1) to the space above therib c.

The cap is shaped to fit the mouth of the jar and is provided with adownwardly-extending flange f, the inner wall f of which is inclinedoutwardly and downwardly, so as to embrace the mouth of the jar abovethe rib c and so that the lower edge of the flange rib 0 near the outeredge thereof.

The gasket 9 is seated on the rib c and encircles the mouth of the jar.The cap when in position bears down upon the rib c, and the inclinedwallf of the flange f engages the outer side of the gasket and crowdsthe gasket inward. The perpendicular outer wall of the mouth of the jarand the inclined wall f of the flange f on the cap form when the cap isin place an upwardly-tapering space, into which the gasket 9 is forcedby an atmospheric pressure when a vacuum or partial vacuum exists withinthe jar. Consequently as soon as the air within the jar is rarefiedinward pressure on the gasket is exerted and the gasket is crowdedfirmly into the tapering space referred to, so as to effect a hermeticsealing of the jar. Simultaneously with this action the cap is crowdeddown on the jar in a manner to oppose the upward movement of the gasket.In such a position the parts remain until the vacuum Within the jar isbroken. This is effected by pushing a knife, pin, or other slenderinstrument upward through the recess e and between the wall f" oftheflange f and the outer side of the gasket g or between the jar andthe inner wall of the gasket. The instant that air passes through theorifice thus formed the pressure on the gasket and cap is relieved andthe cap may be readily lifted from the jar.

The form of the invention shown in Fig. 3 differs in no essentialfeature from that above described. The only difference is that theconstruction shown in Figs. 1 and 2 is such as causes the lower edge ofthe flangef to bear in actual contact against the rib 0, while thatshown in Fig. 3 causes the upper edge of the jar to bear againsttheunder side of the cap and prevents a contact between the rib c andthe flange f. The same tapering space is formed between the mouth of thejar or and the flange f so that the gasket g is forced into the spaceand the sealing of the jar effected. Fig. 4, being a plan view of thejar, shows a construction adapted to either form of the invention.Consequently either form of the cap may be used on the jar. The

especial advantage of the form shown in Fig. 3 is that by the contactbetween the mouth of the jar and the under face of the cap it isimpossible for the contents of the jar to contact with the rubber gasketand thus incur the possibility of disflavorfrom the gasket.

In preserving fruits and vegetables the material is placed within thejar and the cap placed over the mouth thereof and secured by a temporaryfastener. As the contents of the jar become heated the excess ofpressure therein causes the cap to be raised, and the steam and hot airare discharged beneath the the cap. This process goes on until the foodis properly treated, whereupon there will be a partial vacuum within thejar, and upon lowering the temperature of the jar the atmosphericpressure will force the cap firmly down on the jar and seal the same, asdescribed above. The temporary fastener may then be removed, to be usedagain. The peculiar construction of my invention makes this operationefficient and certain. The cap is lifted slightly, and the resilientcharacter of the gasket permits the gasket to becrowded sidewise, sothat the hot air and steam may escape. In order to still furtherfacilitate the escape of the hot air and steam and the consequentrelaxation of pressure within the jar, I provide the construction shownin Fig. 5, wherein the jar a has a rib 0 formed thereon. The rib c hasan opening 6 which extends entirely through the rib to the side of thejar, contradistinguished from extending partly into the rib, as in Figs.1, 2, 3, and 4. The cap f ,with its flange f bears down upon the jar, asin the other forms of the invention, and the gasket g is caused tooperate in a manner the same as before described, excepting that thepressure within the jar tends to force the steam and hot air out of. thejar, whereupon the rubber gasket is flexed down into the recess 6 thusforming a comparatively open space, through which the air of the jar.

- Having thus described my invention, I claim as new and desire tosecure by Letters Patent 1. A jar having its outer wall adjacent to themouth disposed perpendicularly and having an annular rib run around itsouter side at the base of said perpendicular wall, and the rib having arecess at one point, the recess extending into the rib toward saidperpendicular wall, and a cap having a web or main portion extendingover the mouth of the jar to close the same, the cap having at its edgesa downwardly-projected flange extending into proximity to the outerportion of the rib on the jar, and the inner side wall of the flangebeing disposed diagonally downward and outward, said wall extending fromthe upper edge of the perpendicular wall of the jar downward tothe'outer portion of the upper face of the rib, and beyond the innerwall of the recess in said rib, the space between the said perpendicularwall of the jar and the inner wall of the flange serving to accommodatea gasket.

2. A jar having its outer wall adjacent to the mouth disposedperpendicularly, the jar also having an annular rib running around saidperpendicular wall and projecting out therefrom, the rib having a recesstherein which extends inward to the perpendicular wall so as tocompletely cut away the rib at the point of the recess, and a cap havinga web or main portion extending over the mouth of the jar to close thesame, and a cap having at its edges a downwardly-extending flangerunning into proximity with the outer portion of the rib, and the flangehaving its inner side wall disposed diagonally and extending from theupper edge of the said perpendicular wall of the jar downward andoutward to the outer portion of the upper face of the rib, the spacebetween the said perpendicular wall of the jar and the inner wall of theflange serving to accommodate a gasket.

JULIAN P. LYON.

Witnesses:

HENRY A. SCHULTE, THEo. serious.

